2 * Copyright (C) 2012 Cray, Inc.
4 * Author: Nic Henke <nic@cray.com>
5 * Author: James Shimek <jshimek@cray.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 /* this code liberated and modified from Lustre */
25 #define DEBUG_SUBSYSTEM S_LND
29 #define GNILND_RCA_INJ_STRLEN 16
30 typedef struct kgn_sysctl_data {
31 int ksd_pause_trigger;
33 int ksd_rdmaq_override;
34 char ksd_rca_inject[GNILND_RCA_INJ_STRLEN];
37 static kgn_sysctl_data_t kgnilnd_sysctl;
39 #if defined(CONFIG_SYSCTL)
41 static cfs_sysctl_table_header_t *kgnilnd_table_header = NULL;
42 #ifndef HAVE_SYSCTL_UNNUMBERED
49 GNILND_RDMAQ_OVERRIDE,
53 #define GNILND_VERSION CTL_UNNUMBERED
54 #define GNILND_THREAD_PAUSE CTL_UNNUMBERED
55 #define GNILND_HW_QUIESCE CTL_UNNUMBERED
56 #define GNILND_STACK_RESET CTL_UNNUMBERED
57 #define GNILND_RDMAQ_OVERRIDE CTL_UNNUMBERED
58 #define GNILND_RCA_INJECT CTL_UNNUMBERED
61 static int LL_PROC_PROTO(proc_toggle_thread_pause)
63 int old_val = kgnilnd_sysctl.ksd_pause_trigger;
67 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
73 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
78 if (old_val != kgnilnd_sysctl.ksd_pause_trigger) {
79 down(&kgnilnd_data.kgn_quiesce_sem);
80 CDEBUG(D_NET, "setting quiesce_trigger %d\n", old_val);
81 kgnilnd_data.kgn_quiesce_trigger = kgnilnd_sysctl.ksd_pause_trigger;
82 kgnilnd_quiesce_wait("admin sysctl");
83 up(&kgnilnd_data.kgn_quiesce_sem);
89 static int LL_PROC_PROTO(proc_hw_quiesce)
95 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
101 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
107 /* only device 0 gets the handle, see kgnilnd_dev_init */
108 dev = &kgnilnd_data.kgn_devices[0];
110 LASSERTF(dev != NULL, "dev 0 is NULL\n");
112 kgnilnd_quiesce_end_callback(dev->gnd_handle,
113 kgnilnd_sysctl.ksd_quiesce_secs * MSEC_PER_SEC);
118 int LL_PROC_PROTO(proc_trigger_stack_reset)
127 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
131 /* only device 0 gets the handle, see kgnilnd_dev_init */
132 dev = &kgnilnd_data.kgn_devices[0];
134 LASSERTF(dev != NULL, "dev 0 is NULL\n");
136 kgnilnd_critical_error(dev->gnd_err_handle);
138 /* Wait for the reset to complete. This prevents any races in testing
139 * where we'd immediately try to send traffic again */
140 while (kgnilnd_data.kgn_needs_reset != 0) {
142 LCONSOLE((((i) & (-i)) == i) ? D_WARNING : D_NET,
143 "Waiting for stack reset request to clear\n");
144 cfs_pause(cfs_time_seconds(1 * i));
150 static int LL_PROC_PROTO(proc_toggle_rdmaq_override)
152 int old_val = kgnilnd_sysctl.ksd_rdmaq_override;
156 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
162 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
167 if (old_val != kgnilnd_sysctl.ksd_rdmaq_override) {
168 long new_mb = kgnilnd_sysctl.ksd_rdmaq_override * (long)(1024*1024);
169 LCONSOLE_INFO("changing RDMAQ override to %d mbytes/sec\n",
170 kgnilnd_sysctl.ksd_rdmaq_override);
171 /* override proc is mbytes, but we calc in bytes */
172 kgnilnd_data.kgn_rdmaq_override = new_mb;
179 /* /proc/sys entry point for injecting up/down nid event
182 static int LL_PROC_PROTO(proc_rca_inject)
190 rc = ll_proc_dostring(table, write, filp, buffer, lenp, ppos);
197 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
202 /* convert to nid, up/down values */
203 rc = sscanf(kgnilnd_sysctl.ksd_rca_inject, "%s %d", command, &nid);
204 CDEBUG(D_INFO, "command %s, nid %d\n", command, nid);
207 CDEBUG(D_ERROR, "invalid parameter\n");
210 switch (command[0]) {
213 CDEBUG(D_INFO, "take node %d down\n", nid);
217 CDEBUG(D_INFO, "bring node %d up\n", nid);
220 CDEBUG(D_ERROR, "invalid command %s\n", command);
225 CDEBUG(D_INFO, "proc_rca_inject: reporting node_down %d, nid %d\n",
227 rc = kgnilnd_report_node_state(nid, node_down);
236 static cfs_sysctl_table_t kgnilnd_table[] = {
238 * NB No .strategy entries have been provided since sysctl(8) prefers
239 * to go via /proc for portability.
242 INIT_CTL_NAME(GNILND_VERSION)
243 .procname = "version",
244 .data = KGNILND_BUILD_REV,
245 .maxlen = sizeof(KGNILND_BUILD_REV),
247 .proc_handler = &proc_dostring
250 INIT_CTL_NAME(GNILND_THREAD_PAUSE)
251 .procname = "thread_pause",
252 .data = &kgnilnd_sysctl.ksd_pause_trigger,
253 .maxlen = sizeof(int),
255 .proc_handler = &proc_toggle_thread_pause,
258 INIT_CTL_NAME(GNILND_HW_QUIESCE)
259 .procname = "hw_quiesce",
260 .data = &kgnilnd_sysctl.ksd_quiesce_secs,
261 .maxlen = sizeof(__u32),
263 .proc_handler = &proc_hw_quiesce,
266 INIT_CTL_NAME(GNILND_STACK_RESET)
267 .procname = "stack_reset",
269 .maxlen = sizeof(int),
271 .proc_handler = &proc_trigger_stack_reset,
274 INIT_CTL_NAME(GNILND_RDMAQ_OVERRIDE)
275 .procname = "rdmaq_override",
276 .data = &kgnilnd_sysctl.ksd_rdmaq_override,
277 .maxlen = sizeof(int),
279 .proc_handler = &proc_toggle_rdmaq_override,
282 INIT_CTL_NAME(GNILND_RCA_INJECT)
283 .procname = "rca_inject",
284 .data = kgnilnd_sysctl.ksd_rca_inject,
285 .maxlen = GNILND_RCA_INJ_STRLEN,
287 .proc_handler = &proc_rca_inject,
292 static cfs_sysctl_table_t kgnilnd_top_table[2] = {
294 INIT_CTL_NAME(CTL_GNILND)
295 .procname = "kgnilnd",
299 .child = kgnilnd_table
304 void kgnilnd_insert_sysctl(void)
306 if (kgnilnd_table_header == NULL)
307 kgnilnd_table_header = cfs_register_sysctl_table(kgnilnd_top_table, 0);
310 void kgnilnd_remove_sysctl(void)
312 if (kgnilnd_table_header != NULL)
313 cfs_unregister_sysctl_table(kgnilnd_table_header);
315 kgnilnd_table_header = NULL;
319 void kgnilnd_insert_sysctl(void) {}
320 void kgnilnd_remove_sysctl(void) {}